/**
 * Copyright (C) 2011 Angelo Zerr <angelo.zerr@gmail.com> and Pascal Leclercq <pascal.leclercq@gmail.com>
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package fr.opensagres.xdocreport.document.preprocessor.sax;

import java.util.Stack;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public abstract class TransformedBufferedDocument extends BufferedDocument {

	// Table stack
	private final Stack<TableBufferedRegion> tableStack = new Stack<TableBufferedRegion>();
	protected RowBufferedRegion currentRow;

	@Override
	protected BufferedElement createElement(BufferedElement parent, String uri,
			String localName, String name, Attributes attributes)
			throws SAXException {
		if (isTable(uri, localName, name)) {
			TableBufferedRegion currentTable = new TableBufferedRegion(
					getCurrentElement(), uri, localName, name, attributes);
			// currentRegion = currentTable;
			// Add table in the stack
			tableStack.push(currentTable);
			return currentTable;

		} else if (isTableRow(uri, localName, name)) {
			// Check if currentRow belong to a table
			if (tableStack.size() < 1) {
				throw new SAXException(
						"XML mal formatted. XML Row must be included in a XML Table");
			}
			currentRow = new RowBufferedRegion(getCurrentElement(), uri,
					localName, name, attributes);
			return currentRow;
		}
		return super.createElement(parent, uri, localName, name, attributes);
	}

	@Override
	public void onEndEndElement(String uri, String localName, String name) {
		if (isTable(uri, localName, name)) {
			// end of table, remove the last table which was added
			tableStack.pop();
		} else if (isTableRow(uri, localName, name)) {
			// end of row, current region is the last table which was added.
			currentRow = null;
		}
		super.onEndEndElement(uri, localName, name);
	}

	protected abstract boolean isTable(String uri, String localName, String name);

	protected abstract boolean isTableRow(String uri, String localName,
			String name);

	public TableBufferedRegion getCurrentTable() {
		if (!tableStack.isEmpty()) {
			return tableStack.peek();
		}
		return null;
	}

	public RowBufferedRegion getCurrentTableRow() {
		return currentRow;
	}
}
